OA |
OB |
OC |
AB |
AC |
BA |
BC |
BA |
BC |
AB |
AC |
| ||||
|
|
5 | ||||
|
| ||
2 |
π |
4 |
a |
b |
a |
b |
a |
b |
p |
p |
q |
q |
A.(-3,2) | B.(3,-2) | C.(-3,-2) | D.(-2,-3) |
a |
b |
a |
b |
a |
b |
A.4 | B.1 | C.
| D.-1 |
a |
b |
a |
b |
a |
b |
a |
b |
1 |
2 |
P1P |
PP2 |
A.(
| B.(
| C.(2,3) | D.(
|
AB |
CD |
AB |
CD |
A.
| B.-
| C.-
| D.0 或
|
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